60.23% is the change from 518 to 830
Calculation steps:
[( 830 - 518 ) ÷ 518] x 100 = 60.23%
Formula
Percentage change = [(830 - 518) / 518] x 100
Subtract the new number by the original number
830 - 518 = 312
312 ÷ 518 = 0.6023166023166023
0.6023166023166023 x 100 = 60.23%